Panel-board for electrical distribution.



No. 840,068. PATENTED JAN. 1 1907.

E. N. LAKE. PANEL BOARD FOR ELECTRICAL DISTRIBUTION.

APPLICATION FILED JULY 24,1905.

2 SHEETSSHEET 1.

ElwarcZNLake,

wt in asses No. 840,068. PATENTED JAN. 1, 1907.

E. N. LAKE. PANEL BOARD FOR-ELECTRICAL DISTRIBUTION.

APPLICATION FILED JULY 24,1905.

2 SHEETS-SHEET 2 EdwaPdNzai-e wifnesseg: IIEFe/MO/ W l i'ornegr EDWARDN. I LAKE; OF CHICAGO, ILLlh'OlS.

PANEL-BOARD FOR ELECTRiCAL DlSTRlBUTION- Specification of LettersPatent.

Patented Jan. 1, 18C? Application filed July 24,1905. Serial No.270,960.

To (all whom it may; concern:

Be it known that I, EDWARD N. LAKE, a' citizen of the United States ofAmerica, and a resident of Chicago, county of Cook, and State ofIllinois, have invented a new and useful Improvement in Panel-Boards forElectrical Distribution, of which the following is an exact andconcise-description, reference being had to the accompanying drawings,which form a part of this specification.

My invention relates to panel-boards such as are used in thedistribution of current for electric lighting and other purposes inbuildings where many local circuits are fed from main food or powercircuits, and particularly to panel-boards for such instances wheremeters are installed to record the amount of on ergy consumed by each ofthe local loadcircuits.

My objects are to provide a sightly and conven ant means for connectingsuch local load-circuits to the main power-circuits, to provide for thegrouping of any desired local load-circuits together as a single loadunit for measurement of the energy OODSUH'IGd by them, to provide meansfor connecting meters to the power-mains and to such load units as maybe desired, and to provide separate means for access to the switches andl'uses forming essential parts 01 such a panelboard and to the metersand their connectingcircuits.

Two figures accompany this specification, in which Figure 2 shows afront elevation of my panel-board with the front portion, consisting ofdoors and their S111)})01't111g-f1&11108, removed; and Fig. 1 shows asection of Fig. 2 on the line A A.

The construction of the panel-board is as follows:

A main case or body contains all of the anel-board apparatus and themeters and is provided with a front portion 11, iurnishing mounting forthree doors 12 12 and 13. These three doors are provided witlr separatelocks. 'lhc locks giving entrance to the meters and to the meterconnections are similar and operable by the same or similar signedexposed portion of the key 15 in door 13. The object to be accomplishedis to per mit access through door 13 to classes of WOI'lC men which itis desired to exclude from the meters and terminals accessible onlythrough doors 12 and 12, as by access to the terminals of themeter-circuits a falsification of the records could be efl'ected, to theend oi do frauding the parties who are operating'the power system andcharging the consumers according to the meter indications. tire front ofthe case is held in place by bolts, as16 and 16, the bolts themselvesbeing socessible only by use of keys of the style of Ports forpower-circuits and. local load circuits may be provided, as is usual inall simi- The enlar constructions, through the back or sides of thecase. 10.

'Within the case 10 a slab of insulating ma 13, and similar slabs areplaced at 19 and to close the top and bottom of the space,

thus effectually preventing access through door 13 to the meters andconnections pro tected by doors 12 and 12 and also providing" additionalprotection against dust for the apparatus mounted on the face of theslab 17. Meters 80 S1 S2 83 8 1, &c., are mounted in the'case in theside spaces accessible through the doors 12 and 12, the meters shown inthe figures being of the wattmeter type, requiring the connection of thepres sure-circuit in multiple and of the load or service circuit inseries. These meters may be mounted in the space assigned for them inany manner required by the design of the meter. The side slabs or ribs18 and 18 are so placed upon the main slab 17 that the edges of the,main slab project beyond the 'side slabs and into the spaces occupied bythe meters to a sullieient distance to permit the mounting in themeter-conipa-rtment ol terminals, as 20 21 22 23 2-1 25 26 28 and 30 3132 33 34 for the connection of circuit- Wires.

On the face of the slab 17 are mounted, first, terminals 40, adaptedtoconnect with the main power leads or feed-Wires, bringing IIO ' (shownin Fig. l as held single-throw switch,

to the panel-board'the electric current for distribution; second,bus-bars 41 42 43,

at clearance dis- 1 tance above the face of the slab 17 and shown inFig. 2 as extending practically! throughout the length of the tab 17third, a main switch 44, adapted to iisolate the busbars from thepower-mains fourth, fuses ,45, adapted to isolate the bus-bars from thepower-mains; fifth, a pressure-bus 46, con- ,nected with the bus-bar 41and extending beyond the side slabs 18 and 18 to terminals, as and 30,in the meter-compartments; l sixth, a plurality of load-circuit orservicei circuit switches, as 50,- each a double-pole as shown, with onepole I a fuse to a conducting I connected through with the bus-bar 41,as inlink 60, connected dicated, by the screw 60, and with the re ingout through one of 4 meters, indicated in t maining poleconnectedthrough a fuse to a terminal block 50 which is connected by aconducting-strap 50 on the back of the slab 17 to the terminal. 28,associated by location with the switch 50, but located on the face ofthe slab 17 on that edge which projects into the meter-compartn'xent.Adjacent to the two poles of the switch 50 at that end of the blades notconnected as above the holes are drilled through the slab 17 and areadapted to permit load-circuit wires to be brought through the slab 17to be connected to the free terminals of the switch 50, located adjacentto the holes. A circuit thus will be formed from the bus-bar 41 throughconnection indicated by screw'60, conducting-link 60, fuse, one side ofswitch 50, load-wire passholes 50, through the associated with that tothe. anel-board external load element k loadcircuit, returning over theassociated load-wire lea ing through the remaining hole 50. to theremaining side of the switch 50, thence through fuse to termined-50, andthrough conducting-strap 50 to terminal 28 in the meter-compartment,thus constituting the terminal, 28 a load-terminal or service-terminalfor meter-switching. Seventh, a pluralit of conductingbars, as 61 62,connected with bus-bars 42 and. 43 l and passing through side slabs 18to terminals, l as 31 and 32,. in the meter compartments. By"dead-circuit or service-circui in the foregoing is meant that elementof electrical I power" distribution which comprises the power-consumingbranch from the powermainsfor bus-bars and which includes thepower-consuming elements, as lamps or metors and the Wires leadingthereto.

In the meter-com artments are located i re drawings as being of thewatt/meter type, requiring one of the inj ternal circuits of the meterto be connected I in series with the load-circuit whose conl sum tion ofenergy is to be measured and l anot er internal circuit of the meter tobe connected directly across the power-circuit emcee furnishing theenergy consumed. These two internal circuits of the meter may have acommon terminal, as indicated in the middle terminal of the metersshown, the righthand terminal on the drawings being assiuned to be thepressure-terminal, requirin the full voltage of the power-circuit to beaced l on the middle and right-hand terminals, and

the left-hand terminal of the meters, as shown, being assumed to be theseries tor= minal, requiring the circuit'whose consumption of energy isto be measured to be carried in series through the middle and left-handterminals of the meter. The right-hand terminals of all the meters maybe connected to terminal 30 or 30, as shown in Fig. 2, and thusconnected to bus-bar 41, while the middle terminals of all metersrequire to be con nected to one of the remaining bus-bars di rectly tobring to the meter the full difl'erence of potential existing betweenthe bus-bars. The remaining or left-hand terminal of the meter requiresto be connected through the load-circuit to the busbar 41. In my designof panel-board the connection for the middle. terminals of the metersmay be obtained through the terminals 31 32 33 34 35, &c., by which itis seen that any meter may be connected to either of the bus-bars 4243', it being noted also that the terminals 31 32, &c., are so slab 17as to be conveniently accessible to the different meters in theirprobable locations, so as to require a minimum connecting-wire where noarbitrary circuits are required. Thus meter 83 may have its middleterminal connected to meter-terminal 36, and thereby to bus-bar 43; butpreferably meter 83 should be connected to the adjacent meterterminal34, and thereby to bus-bar 42. In my design of panel-board theconnection for the left-hand terminal of the meter may beobtainedthrough the terminals 20 21 22 23 24 25, &c., it, being shown in Fig. 2that in this detail the lett-hand terminal of any meter may be connectedto any load-circuit terminal, as 20 21, &c., or to a plurality of suchterminals, thus any load-circui t or pacing any desired loadcircuitsupon the same meter. In the drawings meter 81 is shown measuring energygiven to a load-circuit through switch 52. Meter switches 53, 50, and54. Also terminal 24 is sh'ownconnected directly to terminal 33, thusgiving service through switch with out measuring the amount of energyconsumed. Meter 82 is shown idle. To con1- plete the circuit abovetraced from bus-bar 4]. to terminal 28, passes from terminal 28, overjumper-wii e0, through meter 80, andover Wire 71 to terminal 32, thenceby bar 62 to bus-bar 42.

I do not wish to limit myself in all respects to the details hereinshown, as many variadistributed along the edge of thelplacing any meterupon serves circuits connected with tiens may be made Without departingfrom the spirit of my invention.

' What 1 claim is' i 1. in a panel-board for electric distribution, thecombination of a mounting-slab l'or switches and fuses, terminals forload-circuits upon said slab, and terminals for nietors upon said slaband interspersed with said terminals for load-circuits, substantially asdescribed.

2. In a panel-board for electrical distribution, the combination of amounting-slab for switches and fuses, terminals for load-circuits uponsaid slab, each load-circuit ter minal being associated with a switch,and terminals for meter-circuits upon said slab, said load-circuitterminals and said metereircuit terminals being interspersed, suistantially as described.

3. In a panel-board for electrical distribu ii tion, the combination ofa mounting-slab for switches and fuses; bus-bars on said slab; terminalson said slab; circuit-branches ex tending from one of said bus-barsthrough switches and'fuses to load-terniinals on said slab, othercircuit branches extending from one of said bus-bars directly'toterminals on said slab; said direct circuit-branch terminals beinginterspersed with said circnit-l'iraneh terminals with associatedswitches, substantially as described.

tion, the co I terminals b in a panebboard for ibination of a mountbus-bars on said slab; switch s on a plurality of terminals on said io-5 caled in groups at or near the e 1 slab; branch circuits from one onbars through said switches to some or spa terminals; and branch circuitshem each of said bus-bars directly to others of said terso minals,substantially as described.

a plurality of terminals on said sla cated in groups or near the ed hslab; branch circuits from one el' bars through said swit it bus-barsdirer v meters located adjace it to and (conductors connecting; torswith te :ninals of" both tially as described.

Signed bv me U State of :hnois, inthc r n esses.

county or Cook,

nee oi (fitness s

